#include<stdio.h>

char* mystrcpy(char*dest,char*src)
{

}
char* mystrstr(char* str1, char* str2)
{
	char* ret = str1;
	
	for (char* i = str1; *i != '\0'; i++)
	{
		char* tem1 = i;
		char* tem2 = str2;
		while (*tem1 == *tem2)
		{
			tem1++;
			tem2++;
		}
		if (*tem2 == '\0') return tem1;
	}
	return NULL;
}

int main()
{
	return 0;
}